Cleaning the print surface with warm water and soap, and then avoiding touching it with your hands, is a good start if you haven’t done so alreayd. Calibrating first layer height, flow rate, temperatures, etc. is generally the way, but if you want a quick and easy solution I gotta say that Magigoo has worked really well for me. It’s a bit expensive, but I’ve reapplied it a few times and never have to wash the bed so that one bottle will likely last a lifetime. I think you can get similar results with a high PVA content glue stick or hair spray. And there are of course other 3d print glues which I haven’t tried, I’m assuming they work equally well.